Mercury MerCruiser 8.1S HO (420-hp)
Multiport Injection (MPI)inboard models are now available with optional Digital Throttle and Shift (DTS). DTS eliminates all helm maintenance and provides silky-smooth shifts for the life of the product. DTS automatically synchronizes multiple engines, provides shift protection and provides SmartStart digital starting. DTS also features Transmission Guardian to maximize your time on the water.

Key Features

PCM 555 sequential fuel injection and high energy distributorless ignition system ensure reliable starts and outstanding performance, year after year